map-system

This generic function maps function over each module-group in
system. fun should be a
function that takes one argument which will be a module-group. The
default method returns nil, but is called for
its side effects.

The value of the silent keyword argument can
be t or nil. Its
default value is nil. t means do not print anything while performing the
operation. A true value of
simulate overrides silentt. If the value of this
keyword argument is t, then the functionality
is similar to make -s.

The value of the simulate keyword argument can
be t or nil. t means
print the list of actions that would be taken if the operations were
to be performed at this time, but do not actually perform the
operations. If the value of this keyword argument is t, then the functionality is similar to make
-n.

The value of the include-components keyword
argument can be t or nil. The default value is t, which means perform a map-system operation on all
component systems of system. A value of nil
means ignore component systems.

The value of the module-keys keyword should be
a list of keywords and arguments to be passed as a keyword list to the
map-module-action method for each module-group.